Dua before sleep seeking protection on the Day of Judgement
The Prophet ﷺ, when he wanted to go to sleep, he would place his cheek upon his right hand and said, "rabbi qinī ʿadhābaka yawma tabʿathu ʿibādak (O My Lord, protect me from Your punishment on the Day You resurrect Your servants.)"
كَانَ النَّبِيُّ ﷺ إِذَا أَرَادَ أَنْ يَنَامَ وَضَعَ خَدَّهُ عَلَى يَدِهِ الْيُمْنَى وَقَالَ: «(رَبِّ قِنِي عَذَابَكَ يَوْمَ تَبْعَثُ عِبَادَكَ.)»